Deals with constant flow rate controller characteristics, the performance of the proportioning damper fitted to a dual duct box and the degree of temperature mixing achieved by this latter, as well as with casing leakage. Both single and dual boxes are covered, also single duct units.
BS 4979-1:1973
Original price was: $264.16.$132.00Current price is: $132.00.
Methods for testing and rating air control devices for air distribution systems-Aerodynamic testing of constant flow rate assemblies without a heat exchanger
BSI Group , 08/29/1975
